Kereiti ea ho nepahala ea letoto la TXR (setoko se tloaelehileng sa mofuta oa letsoho le nang le nate e le 'ngoe) se thehiloe ho C5, Ct7 le Ct10(JIS B 1192-3). Ho latela kereiti ea ho nepahala, Axial play 0.005 (Preload :C5), 0.02 (Ct7) le 0.05mm kapa ka tlase ho (Ct10) li teng. TXR series (Standard stock of Sleeve type single nut ball screw) ea screw shaft screw material S55C (induction hardening), nut material SCM415H (carburizing and harding), bokaholimo bo thata ba karolo ea "ball screw" ke HRC58 kapa ho feta.